Gravity dust-collector.



No. 823,463. PATENTED JUNE 12, 1906. D. DENEEN.

GRAVITY DUST COLLECTOR.

APPLICATION FILED NOV. 15, 1904.

DENNISDENEEN, or GLENCOE, MINNESOTA.

GRAVITY DUST-COLLECTOR.

Specification of Letters .Patent.

Patented June 12, 1906.

i To all whom it may concern.-

Be it known that I, DENNIS DENEEN, of Glencoe, McLeod county, Minnesota,- have invented certain new-and useful Improvements in Gravity Dust-Collectors, of which the following is a s ecification.

My invention re ates to dust-collectors designed particularly for use in flour-mills and like places; and the object of the invention is to provide an apparatus having a very large dust-collecting area in proportion to the space it occupies.

A further object is to provide a dust-collector of simple and economical construction and one that can be easily and quickly set up and put in use.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in a series of flattened cloth tubes open at one end and having orifices or o enings at the other and through which the ust-laden airis conducted into the-tubes.

Further, the invention consists in various constructions and combinations, all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a vertical section of a dust-collector embodying my invention, Fig. 2 is a detail sectional view of the upper portion of the collector, taken on a line substantially at right an les to Fig. 1. Fi 3 is a transverse section. 'g. 4is a detail sectional view showin the manner of conveying the accumulate dust out of the base of the machine. 7

In the drawings, 2 re resents a box having an air-trunk 3 on one si e that communicates with a blast-fan. The bottom of the box is rovided with a series of parallel slots 4, that I sad to the interior of a corresponding number offiattened tubes 5, composed of muslin of fine mesh that is held between the upright bars 6, having rounded or curved outer faces 7. The edges of the cloth of which each tube is composed are sewed together after being passed around the bars, causing the middle portion of each tube between the bars to be drawn taut, as shown in Fig. 3. There may be any number of these tubes, according to the amount of dust to be collected, and the tubes may be of 'any suitable length, those in the machine Which I have shown in the drawings be-. ing referably about six feet. The lower ends of t e tubes are open and fit within abo'x 8,

Application filed November 15, 1904. Serial No. 232,797.

wherein a carrier-belt 9, having slats 10 at intervals thereon, is arranged. Thebelt is located above a horizontal shelf 1 1, over which the slats sweep and collect the dust from the tubes at one end of the box, where they fall from the shelf into a screw conveyer 12. The shaft of the conveyer projects through the wall of the box at one end and is provided with a pulley 13, and a chain 14 connects the said shaft with one of the conveyer-belt shafts. The other end of the conveyer-shaft projects through a hole 15 in the wall of the ox and has a bearing in a bracket 16. A plate 17 is loosely mounted on the conveyershaft, and a spring 18, arranged on the shaft between the bracket 16 and the plate 17, normally holds the plate against the wall of the box with a yielding pressure and closes the opening 15. As soon as a sufficient amount 0 dust has accumulated in the conveyer to overcome the tension of the spring 18 the plate 17 will slide on the shaft and allow thedust to be discharged from the machine. To prevent the walls of the tubes from sagging andlying against one another, I prefer to provide a series of coiled wires 19, strung back and forth between the tubes.

The operation of the collector is as follows: The machine is placed upon the top of a purifier or in any other suitable position in the mill where it may be desirable to collect the dust and the box at the top of the machine connected with a blast-fan, which discharges the dust-laden air into the box and down through the slots or c. cks in the bottom thereof into the tubes beneath. The base of the machine being closed against the escape of air, it will pass out throu h the meshes of the tubes, leaving the dust in the tubes and allowing it to settle by gravity down through the lower ends of the tubes upon the belt and shelf, from whence it will be discharged into the screw conveyer and conducted out of the machine. The tubes are suspended close to-' gether, so that the air-current passing out through the meshes of one tube w1ll meet and be checked by a corresponding current of the contiguous tube, and consequently there will be no suction throughthe meshes of the fabric to draw the dust out of the tubes or inter-,

fere with its settlin by gravity to the bot tom. The use of t ese flattened tubes allows me to provide a very large dust-collecting area without increasing the dimensions of the machine beyond what would be practicable for use in a mill. Obviously there may be as many of these flattened tubes as preferred, according to the amount of dust to i be collected, and they may be made ofany it from entering the tubes under pressure,

and said tubesbeing arranged close together whereby the air-currents assing through the meshes of contiguous tu es will oppose one another and be checked and the dust retained in the tubes will settle by gravity to the bottom.

2. A dust-collector comprising a series of tubes of pervlous fabric of umform diameter throughout their length and having open lower ends and closed at their upper ends except for narrow cracks or slots leading there in, said cracks being of less width than the space between the walls of each tube at its 11 per end and communicating with an airblast and adapted to check the same and prevent it from entering the tubes under pressure whereby'the dust will be precipitated by gravity to the bottom of the tubes and the air will pass out through the meshes thereof, substantially as described.

3. A dust-collector, comprising a series of arallel tubes of ervious fabric having open ower ends and'cl dsed at their upper ends OX cept for narrow cracks or slots leading therein, said cracks communicating with the airgether, whereby the aircurrents assin through the meshes of contiguous tu )es wiil oppose one anotherand be checked and the dust retained in the tubes will settle by gravity to the bottom, and wire coils separating the wall of one tube from the contiguous parallel wall of the adjoining tube.

4. A dust-collector, comprising a series of upright bars arranged in pairs with spaces between them and a pervious fabric extending around the bars of the same pair from one to the other and forming a vertical flattened tube between them, the lower ends of the tubes being open and their upper ends closed, except for narrow cracks or slots leading therein, said cracks being of less width than the space between the walls of each tube at the top and communicating with an airblast and adapted to check the same and prevent it from entering the tubes under pressure, the walls of the adjoining tubes being close together and substantially parallel with one another whereby the air-currents passing through the meshes of contiguous tubes will meet and oppose one another and be checked" and the dust retained in the tubes will settle by gravity to the bottom, substantially as described.

In witness whereof I have hereunto set my hand this 10th day of November, 1904.

' DENNIS DENEEN. Witnesses:

R. H. MCCLELLAND, F. A. J. LUDnoPE. 

